Cheng-Yue Sun, Shujing Wen, Jingkai Zhao
Oct 11, 2017
Citations
0
Influential Citations
16
Citations
Journal
Energy & Fuels
Abstract
In this work, the blends of 1-hydroxyethyl-3-methylimidazolium glycine ([C2OHmim][Gly]) synthesized by our laboratory and N-methyldiethanolamine (MDEA) in aqueous solution were prepared for CO2 capture, and the maximum absorption performance of the blends was obtained at the mole ratio of 8:2 of MDEA/[C2OHmim][Gly] with a total concentration of 1.0 mol L–1. CO2 loading of the blended absorbent was less adversely influenced by the temperature and O2 concentration than that of MDEA aqueous, and it had a good performance in regeneration ability. The reaction mechanism of the CO2 absorption in MDEA/[C2OHmim][Gly] was investigated by 13C nuclear magnetic resonance. CO2 first reacted with [C2OHmim][Gly] to form carbamate, and then carbamate promoted the reaction between CO2 and MDEA, which could be described as a shuttle mechanism. The kinetics of CO2 absorption was investigated in a double stirred-cell absorber at different temperatures, and some important kinetic parameters were obtained, such as the reaction...